Matrices and blanks for making tablets.



l L. BowMAN.. ITBIOBS LND BLANKS FOB IAIIIG APPLIOLTIOI FILED JAI. '1.1910.

Patented ocu 25, 1910.

s annua-4MM 1. v'

IN VEN TOR,

WTNESSES Ww A WHW .Altarn'ey v IlLlIATvRIClElSrI AND BLANKS FOR MAKINGTABLETS. c

pecication of Letters Patent. i Patented Oct, 25, 1910,

Ap'plnmon mea January 7, i910. serial No. 536,945.

To all whom it may concern: broken perspective view, illustrating the Beit known that l.. LLoYp BOWMAN, a manner of setting up matrices andblanks, 'citizen of the United States,'residing at and Fig. 15 is abroken sectional view of Fort Wl'voi'tli, in the county of Tarrant andblanks made integral with the bed plate of 60 State of Texas, haveinvented certain new the mold. and useful Improvements in Matrices andSimilar characters of reference vare used Blanks for Making Tablets andthe Like, t0 indicate the same parts throughoutvthe of which thefollowing is a specification. several views.

My invention relates to matrices and A mold'is shown in the drawings butit 65 blanks for lettering various articles having must be'understoodthat this invention is extended faces or surfaces manufactured notlimited to any particular design of mold. from plastic material, and theobject is to, The mold shown has side pieces 1 and 2, provide means formanufacturing such artin 4top piece 3 and a base piece 4. Suitable cleswith the lettering formed in or on the Clamps Flare pIOvided for holdingthe parts l articles during the molding thereof, and Of the mold 1noperative position. A bed more particularly to mold such articles soplate 6 iS PIOVEdMId tlllS bed Plate iS SUP- tliat the surface betweenand about the let` POI'GCl On a blOCk 7 0f Suitable COIligul'ltiOn. tersor figures or symbols will be smooth Fig. 2 ShOWS a Continuation 8 ofthe bed and have surfaces unbroken by roughplaces plate extending downby the base. The or ridges. Y blanks 9 are mounted directly on the bedAnother object is t0 provide means for late 6. The matrix blOCkS l() aremounted manufacturing such articles in a rapid, ecoetween the blanks 9.'The blanks thus have nomical and efficient manner, grooves or channelsfor receiving any nu1n' Other objects and advantages will be fully bel'Of matrix blocks therebetween. 'The 80 `explained in the followingdescription and blanks may be made as separate pieces from the inventionwill be more particularly the bed plate, aS Shown in the drawings, and fpointed out, in the claim. as refererd to above and the blanks mayReference is had to the accompanying also be made integral with a bedplate drawings which form apart of this applica- ShOWn in Fig 15a as theblanks l1 and bed 85 tion. slate 12 with its continuation 13. If theFigure 1 is a perspective View of a comlanks are made as shown in Fig.15, the plete mold for making a tablet; Fig. 2 is a matrix blocks wouldhave to be put infrom perspective view '0f a bed plate with blanks theSides' kOf the 'bed plate. The blanks ll and matrices arranged thereonfor receiving are undercut and the InatIX blocks would a plasticmaterial; Fig, 3 is a perspective be dove-tailed into the channels 14between view of a blank used on the bed plate bethe blanks 1'1- 'Y tweenthe letter matrices. Fig. 4 is a sec` In settin up the matrix blocks andblanks tional elevation of a mold with blanksand as set fortl in Figs.l1 to 14, inclusive, the matrices for making letters; Fig. 5 is anmatrix blocks may be placed directly on the 95 enlarged sectional detailview of the bed bed plate and lined up and then a blank plate withsections of blanks'and matrices placed against the ro'w of matrix blocks10 thereon. Fig. 6 is an enlarged sectional deand then another row ofmatrix blocks 10. tail view of onematrix and parts of two It will beseen that where the blanks are yother matrices,v illustrating the mannerof Vmade se arate vfrom the bed plate the maforming the joint betweenthe matrices. trix bloc s may be set up with greater ease Fig. 7 is aface View of a matrix for making and more quickly than where the blanksare sunken letters; Fig. 8 is a face view of a formed integral with thebed plate. Where matrix for making raised letters. Figs. 9 the blanksare made separate from the bed and 10 are Ysections of Fig. 8 takenrespecplate the may be held to the bed plate in 105 tively on lines w-mand '1 y, of Fig. 8. any suitable manner, but, as a. matter of con- Fig.11 is a perspective view of three mat- 'venience, the `sides 1 and 2 andthe top 3 of rices. Fig. 12 is a Vface view of three letthe lmold boardswill be sufficient to hold thev ters which can be made by such matricesas blanks and matrix blocks on the bed plate. shown in Fig. 11. Fig. 13is a-broken per? Attention is called Ato the forms of the ma- 11"spective view showing the relative positions trix blocks and the blanksand the distin- 0fthe matrices and blanks.: Fig. 14` is a guishingfeature of this invention from-preyblock 10 and t e b ank 9 being thusformed ner. v

' vj trixbiocks is much wider mbe bottom than "at the top. The jointbetween two matrix edges. A great diliculty heretofore encoun- 'theleast possible surface bearing. For this vious inventions liesparticularly inV forming the blanks and the matrix blocks so that themeeting faces will be formedV by feather tered in making smooth surfacesfor such articles as contemplated, has been the formation of ridges atthe junction or joints of' parts of the mold for formi the face of thearticle to be molded. T e cement or other plastic would run down betweenthe pieces and this would make ridges and rough places on the surface ofthe articles to be manufactured. These diiculties are overcome by makingthe meeting faces with reason every oint either between a--matrix blockand a lank or `between the matrix blocks themselves is formed by featheredy es'I or sharp edges. A feather or sharp eggs can be ,more easilyvcleansed than if two extended at faces were to come together. It wouldbe practicallyimpossible to prevent plastic material from enteringbetween two extended flat faces.

By reference to Figs. 5 and 9 of the drawings it will. be seen that thecrevice 15 between the blank 9 and the matrix block 10 is wider at thebottom than at the top and that the block 10 and blank 9 touch eachother only atthe to Ved es, the joint between the with sharp or featheredges. .The matrix blocks are also constructed in the same man- Byreference to Fig. 6 and Fig. 1`0lit will beseen that the crevlce 16between two mahlocks Ais thus formed by two sharp or feather edges. Asurface prepared of i blanks and matrix blocks in the manner thus ievase; Y,

described will be smooth as it will be racticallyimpossible `for cementor other p astic to run down between the meetingedges which form thejoints. The blanks and the matrix blocks can be wedged close togetherand held in contact with each other by the molds, that is, the moldingpieces 1, 2 and 3 with the clamps 5, the wei ht of the mold pieces'beingsuiiicient to hol the blanks and matrix blocks in position while theplastic material is being placed in the molds. The matrix .blocks may bemade of any suitable dimensions and the blanks may be madeof anydesirable width. This method of forming surfaces can be used to makeraised letters or sunken letters, as illustrated in the drawings, Fig. 7showing a matrix block for formin a sunken letter and Fig. 8 showing amatrixlock for formin a raised letter.

' Having fully describe my invention, what I claim as new and desirelto* secure by Letters Patent, is,- I

In molds for making and lettering tablets and the like, the combinationof slde and end pieces and a bed plate, and blanks and matrix blocksmounted` on said bed plate, said blanks having undercut ed s and Saidmatrix blocks being dovetailed etween the blanks and said blanks andmatrix blocks being held in place by saidsides and ends, the jointsbetween saidV blanks and matrix blocks and between said matrix blocksbeing formed by feather. or sharp edges.

In testimony whereo I' affix my signature, in presence of two witnesses,January 7th, 1910.

LLOYD BOWMAN.

lVitnesses:

A. L. JACKSON, J. H. BOYDEN.

